KL Serials vs OBDocker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KL Serials
This utility app measures various electrical parameters like voltage, current, and power. It also offers multiple protection functions, including over-voltage, over-current, and over-temperature alerts, while monitoring battery capacity in real-time.
- Measures voltage, current, power, and capacity
- Monitors watt-hours and time
- Over-voltage protection
- Over-current protection
- Over-temperature protection
- Real-time battery capacity monitoring
- Automatic current direction identification
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The KL-F series volt-ampere meter is a new type of coulomb meter that can measure various physical parameters such as voltage, current, power, charge and discharge capacity, watt-hours, and time. At the same time, it can also set parameters to achieve over-voltage protection, under-voltage protection, Multiple protection functions such as over current protection, over power protection, and over temperature protection. The meter can automatically identify the direction of the current, and can monitor the battery capacity in real time.
OBDocker
This app acts as a professional OBD2 car scanner, enabling users to diagnose, service, and customize their vehicles. It offers comprehensive diagnostic modes, real-time data monitoring, and various service functions like oil resets and battery registration.
- Triple-mode diagnostics (Full-Systems, Multi-Systems, Quick Scan)
- Triple-mode live data monitoring (Health, Engine, Dash)
- Full-cycle service functions (Emissions Pre-Check, Control Tests, Oil Reset, Battery Registration)
- One-click car setting adjustments and retrofits
- Supports a wide range of car brands and models
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Crafted with user-friendliness and power in mind, OBDocker is a professional OBD2 car scanner app that empowers you to diagnose, service, and customize your vehicles with ease and precision. ************************* KEY FEATURES → Triple-Mode Diagnostics ○ Full-Systems Diagnose: One-Click OE-Level full-systems diagnostics. ○ Multi-Systems Diagnose: Scan multiple systems through ECUs filtering such as TMS, SRS, ABS, TCM, BCM and many more. ○ Quick Scan: Swiftly read and clear engine fault codes to maintain a smooth drive. → Triple-Mode Live Data ○ Health Monitor: Track every systems performance by diving into real-time parameters. ○ Engine Monitor: Monitor your engine's performance. ○ Dash Monitor: Visualize your vehicle's metrics in real-time. → Full-Cycle Service ○ Emissions Pre-Check: Test your emissions and pass with confidence before your official check. ○ Control Tests: Perform EVAP Leak Test, DPF and Inducement System Reinitialization. ○ Oil Reset: Easily reset oil change reminders and maintenance lights to keep your car's records up to date. ○ Battery Registration: Register the battery replacement to notify the battery management. → On-Click Modification ○ Adjustments: Adjust different car settings and customize them by one-click. ○ Retrofits: Easily adapt additional vehicle parts after installation. ************************* OBD ADAPTERS OBDocker requires a compatible OBD adapter to work. We recommend the following for the best experience: - High Performance: Vlinker Series, OBDLink Series, MotorSure OBD Tool, Carista EVO. - Middle Performance: All genuine adapters compatible with ELM327 / ELM329, including Veepeak Series, Vgate iCar Series, UniCarScan, NEXAS, Carista, Rodoil ScanX, and more. - Low Performance (Not Recommended): Cheep Chinese clones ELM. ************************* SUPPORTED CARS OBDocker is compatible with a wide range of vehicles, covering both standard and advanced modes: - Standard Mode: Universal compatibility with OBD2 / OBD-II or EOBD vehicles worldwide. - Advanced Mode: Toyota, Lexus, Nissan, infiniti, Honda, Acura, Hyundai, Kia, Volkswagen, Audi, Skoda, SEAT, Mercedes-Benz, BMW, Mini, Porsche, Ford, Lincoln, Chevrolet, Cadillac, GMC, Buick. And still working really hard to add more… ************************* PLANS: OBDocker offers a free trial for full feature access. To unlock unlimited potential, choose from our Pro or Pro Max subscriptions. NOTE: Vehicle ECUs vary in the amount of sensors supported. This app can’t show you something, that is not provided by your car. Terms and Conditions: https://www.obdocker.com/terms-and-coditions Privacy Policy: https://www.obdocker.com/privacy-policy Apple Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: KL Serials at none against OBDocker's 7. KL Serials also leads on rating (4.5 vs 4.2) and iOS requirement (9.0 vs 13.0). OBDocker's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (17 vs 2). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. OBDocker sells 7 in-app purchases, starting at $2.99 per month. KL Serials asks for nothing beyond the download.
KL Serials holds the better App Store score, 4.5 against 4.2. That said, the two scores are not equally well evidenced: OBDocker has 17 ratings behind it against 2, so its average is the more settled of the two.
KL Serials ships an update every 3 months, OBDocker fortnightly. The most recent releases landed on September 21, 2026 and September 27, 2026 respectively.
| Parameter | KL Serials | OBDocker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | 4.2 (17 ratings) |
| Positive reviews | — | 48.4% of reviews |
| Number of ratings | 2 | 17 — better |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 29 MB | 238 MB |
| Age rating | 4+ | 4+ |
| Developer | Hangzhou Junce Instruments Co., Ltd. | Motorsure. Inc |
Customer experience
KL Serials
OBDocker
In-app purchases
KL Serials
No in-app purchases
OBDocker
- OBD Pro (Monthly)$2.991 Month
- OBD Pro Max (Monthly)$7.991 Month
- OBD2 Pro (6 Months)$14.996 Months
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- OBD Pro (Annual)7 Days trial$17.991 Year
- Mechanic Access (Quarterly)$19.993 Months
- OBD Pro Max (Annual)7 Days trial$47.991 Year
- OBD Pro Max (Permanent)$119.99









